Relief shown by hachures. Includes 8 inset maps and abbreviation table. " ... containing the lines of oceanic mail steam communication and overland routes, the great aerial and submarine telegraphs, and the principal tracks of sailing vessels; showing the direction and mean velocity of oceanic currents and important deep-sea soundings; with 4 additional charts shewing the general currents of air, the cotidal lines and the lines of equal magnitude variation." Wall map.
